| 摘要 |
A tube (1) curved in a manner to form an a angle in order to provide direction for more effective use of canal instrument (3) in small bone cavities during apical resection applied in endodontic surgery of dentistry and shaping canals from root apical towards coronal in root canals not allowing access through coronal and advancement up to the depth desired in coronal direction, which is located in resected tooth apical and guide location of canal instrument (3). The said a angle is between 90° and 120° and the said tube (1) is manufactured from stainless steel or plastic material of cylindrical structure as casting. |
